Doing a job we're doing right that includes installing 78 trees. We are 6" below average rainfall for this year already. Needless to say the soil is like a rock around here. We've been putting 3 stakes per tree as required by the job's contract. It's killing my manhours as it's taking AT LEAST 20 minutes to drive three stakes, I considered half of that..... Is there something like a gas powered stake driver or maybe an attatchment for a Cat 257B that drives stakes with hydraulic power?